Electric-lamp fixture.



H. G. HAWKS.

ELECTRIC LAMP FIXTURE.

APPLICATION FILED JULY 3, 1909 1,070,463. Patented Aug. 19, 1913.

witnesses lnvenior:

Horaio (.Hawks.

UNITED %TATE% PATENT I-IORATIO C. HAWKS, OF NEWTON, MASSACHUSETTS.

ELECTRIC-LAMP FIXTURE.

LG'WAGS.

Application filed July 3, 1909.

To all whom it may concern:

Be it known that I, HoRA'rIo C. HAWKS, a citizen of the United States,and a resident of Newton, in the county of MiddleseX, State ofMassachusetts, have invented an Improvement in Electric-Lamp Fixtures,of wiich the following description, in connection with the accompanyingdrawings, is a specification, like letters on the drawings representinglike parts.

This invention relates to fixtures for electric lamps or the like, beingmore particularly intended to provide an improved re fleeting attachmentfor use with incandescent lamps of high candle power for street andpublic lighting, although the invention is not limited to thisparticular use.

The character of the invention may be best understood by reference tothe following description of an illustrative embodiment thereof shown inthe accompanying drawing, wherein:

Figure 1 is a view partly in section and partly in elevation of theillustrative fixture embodying the invention; Fig. 2 is a bottom planview of Fig. 1; and Fig. 3 is an enlarged sectional detail of partsshown in Fig. 1.

Referring to the drawings I have therein shown a lamp fixture embodyingone form of my invention, the same consisting of a reflector 3 of steelor other suitable material, having preferably a radially fluted,porcelain enameled or other suitably prepared reflecting surface for thepurpose of securing by reflection a wide and efficient distribution oflight from the incandescent lamp T0. The flutes for the reflector hereinshown are of a wide angled V-SlliLPGd cross section.

Tt has been found. that, for a vertically arranged lamp, the widest andmost efficient light distribution is obtained from a horizontalreflector having ribs or flutes substantially or closely approximatingthe horizontal. Heretofore, particularly for outdoor reflectors, thisposition of best efficiency has been departed from more or loss, sinceit has been necessary to provide a pronounced dip or inclination fromthe center toward the periphery of the reflector in order to permitwater and accumulated ice or snow to drain off from the top of thereflector.

In the disclosed form of reflector there is preerved a substantiallyhorizontal position for the ribs or flutes, the top of the re-Specification of Letters Patent.

Patented Aug. 19,1913.

Serial No. 505,829.

flector being protected and drained by a protective hood 5 of galvanizedsteel or other suitable material having its surface conveXed or inclineddownwardly toward its periphery to shed rain and prevent theaccumulation of ice or snow on the top thereof.

Tn reflectors heretofore employed and particularly large size enameledreflectors, considerable trouble has been experienced from injury to thereflector or its enamel from handling the same and from injury afterinstallation. This may be due to the cracking of the enamel owing to thevibration of the reflector, caused by a high wind, or other injury maybe caused if the reflector is unprotected. In the inclosed form ofreflector the latter is so supported and protected as to guard itagainst mutilation in handling, and preventing, after its installation,any material vibration in one part of the reflector relative to anotherpart thereof. For this purpose the flutings of the reflector terminate ashort distance from the periphery of the reflector to leave a flat rim7. This permits the reflector to receive a substantially continuoussupport from the hood 5, the latter having its edge 8 lapped over theentire flat circumferential et ge of the reflector so as to hold thelatter securely in a groove 9 formed by the said lapped over edge. Thisprovides a protecting rim for the enameled surface of the reflector andre oluces any likelihood of mutilation in han dling the same. At thesame time it gives a continuous circumferential support to the reflectorfrom the hood so that the edge of the former cannot be set intovibration by the wind and its enamel caused. to crack from such cause.Preferably the edge f the hood is pressed up securely to the edge of thereflector so that the latter is permanently and rigidly held by thehood, the combination of the inclined hood with the horizontal reflectorcircumferentially attached in this fashion providing a structure havinggreat strength and adapted effectually to resist distortion ordisplacement of the hood relatively to the reflector.

Herein a lamp 10 of the tungsten type is used. in connection with thereflector, 't being understood, however, that other styles may be usedas desired. The lamp is supported in any usual or suitable manner in asocket 11 which is inserted through a central aperture 13 in thereflector and is received by an ordinary form of hollow cast iron canopy15 which may be secured by set screws 17 to a flange 19 projectingupwardly from said hood. It will be seen that, while the fixture as awhole receives the usual central support from the canopy, the reflectorreceives a continuous circumferential support from the hood.

In order to simplify the construction for those cases where it isdesired to employ a lamp guard, means are preferably provided forsecuring the lamp guard attachment or support directly to the reflectorinstead of to the lamp or its socket as has heretofore been thepractice, such construction as adopted in the illustrated embodimentalso serving to strengthen the reflector. To this end the centralportion of the reflector is cupped out to form a shouldered recess withan upwardly extending flange 23 (Figs. 1 and 3), within which recess maybe riveted or otherwise secured a threaded annular sleeve 25 of copperor other suitable material. The'lamp guard 21 may then be provided witha similar threaded sleeve 27 at its base by which it may be directlyattached to the reflector or removed therefrom without in any waydisturbing the lamp. By supporting the lamp guard directly on thereflector the guard is rigidly held in place and is prevented fromswinging about and chipping or otherwise mutilating the adjacentenameled surface of the reflector. The annular central flange 23 in thereflector formed for the reception of the lamp guard attachmentcontributes also to the original rigidity and solidity of the reflectorand hood.

It will be understood that several features of my invention, while bestadapted for combination with each other may be Copies of this patent maybe obtained for used independently each of the other. It is also to beunderstood that this invention is not limited to the particularembodiment shown herein, nor to the particular purpose to which it isshown applied, but that its construction and adaptation may be variedwithin wide limits without departing from the spirit of the invention.

Having thus described my invention, what I claim is:

1.. In a lamp fixture the combination of a lamp, a reflector thereforhaving a shouldered recess, a threaded ring rigidly secured in therecess and a lamp guard adapted to be screwed into said ring.

2. In a lamp fixture, the combination with a reflector having anenameled fluted reflecting surface, a protecting hood to which saidreflector is secured along its circumferential edge, said reflectorhaving a central lamp receiving aperture and a lamp guard attachmentrigidly secured to the reflector at said aperture, thereby strengtheningthe reflector thereat.

3. In a lamp fixture, the combination of a reflector having a flutedenameled surface provided with substantially horizontal reflectingflutes terminating short of the circumferential edge thereof to leave aflat rim, and an inclined protecting hood for the top of the reflectorhaving its circumferential edge lapped over and under said rim toprotect the latter and hold the same securely in a groove formed by saidlapped over edge.

In testimony whereof, I have signed my name to this specification, inthe presence of two subscribing witnesses.

HORATIO C. HAWKS. Witnesses:

EVERETT S. EMERY, THOMAS E. Boo'rrr.

five cents each, by addressing the Commissioner of Patents,

Washington, I). C.

